This standard specifies the technical requirements and test methods for thermosetting powder coatings with epoxy resin and polyester resin as binders, which are mainly used in the painting of freezer compartment doors, compartment doors, refrigerator compartment doors and boxes of refrigerators. The standard involves the preparation, test methods and performance requirements of coatings, including the Hardness, Gloss, adhesion, acid and alkaline resistance of the paint film, salt spray (fog) resistance, humidity resistance, etc. The standard cites a number of national standards to guide the test operation, and puts forward requirements for the safety and protective measures of powder coatings to ensure the health and safety of operators.